/*!
 * MockJax - jQuery Plugin to Mock Ajax requests
 *
 * Version:  1.5.3
 * Released:
 * Home:   http://github.com/appendto/jquery-mockjax
 * Author:   Jonathan Sharp (http://jdsharp.com)
 * License:  MIT,GPL
 *
 * Copyright (c) 2011 appendTo LLC.
 * Dual licensed under the MIT or GPL licenses.
 * http://appendto.com/open-source-licenses
 */
(function ($) {
    var _ajax = $.ajax,
            mockHandlers = [],
            mockedAjaxCalls = [],
            CALLBACK_REGEX = /=\?(&|$)/,
            jsc = (new Date()).getTime();


    // Parse the given XML string.
    function parseXML(xml) {
        if (window.DOMParser == undefined && window.ActiveXObject) {
            DOMParser = function () { };
            DOMParser.prototype.parseFromString = function (xmlString) {
                var doc = new ActiveXObject('Microsoft.XMLDOM');
                doc.async = 'false';
                doc.loadXML(xmlString);
                return doc;
            };
        }

        try {
            var xmlDoc = (new DOMParser()).parseFromString(xml, 'text/xml');
            if ($.isXMLDoc(xmlDoc)) {
                var err = $('parsererror', xmlDoc);
                if (err.length == 1) {
                    throw('Error: ' + $(xmlDoc).text());
                }
            } else {
                throw('Unable to parse XML');
            }
            return xmlDoc;
        } catch (e) {
            var msg = (e.name == undefined ? e : e.name + ': ' + e.message);
            $(document).trigger('xmlParseError', [msg]);
            return undefined;
        }
    }

    // Trigger a jQuery event
    function trigger(s, type, args) {
        (s.context ? $(s.context) : $.event).trigger(type, args);
    }

    // Check if the data field on the mock handler and the request match. This
    // can be used to restrict a mock handler to being used only when a certain
    // set of data is passed to it.
    function isMockDataEqual(mock, live) {
        var identical = true;
        // Test for situations where the data is a querystring (not an object)
        if (typeof live === 'string') {
            // Querystring may be a regex
            return $.isFunction(mock.test) ? mock.test(live) : mock == live;
        }
        $.each(mock, function (k) {
            if (live[k] === undefined) {
                identical = false;
                return identical;
            } else {
                // This will allow to compare Arrays
                if (typeof live[k] === 'object' && live[k] !== null) {
                    identical = identical && isMockDataEqual(mock[k], live[k]);
                } else {
                    if (mock[k] && $.isFunction(mock[k].test)) {
                        identical = identical && mock[k].test(live[k]);
                    } else {
                        identical = identical && (mock[k] == live[k]);
                    }
                }
            }
        });

        return identical;
    }

    // See if a mock handler property matches the default settings
    function isDefaultSetting(handler, property) {
        return handler[property] === $.mockjaxSettings[property];
    }

    // Check the given handler should mock the given request
    function getMockForRequest(handler, requestSettings) {
        // If the mock was registered with a function, let the function decide if we
        // want to mock this request
        if ($.isFunction(handler)) {
            return handler(requestSettings);
        }

        // Inspect the URL of the request and check if the mock handler's url
        // matches the url for this ajax request
        if ($.isFunction(handler.url.test)) {
            // The user provided a regex for the url, test it
            if (!handler.url.test(requestSettings.url)) {
                return null;
            }
        } else {
            // Look for a simple wildcard '*' or a direct URL match
            var star = handler.url.indexOf('*');
            if (handler.url !== requestSettings.url && star === -1 ||
                    !new RegExp(handler.url.replace(/[-[\]{}()+?.,\\^$|#\s]/g, "\\$&").replace(/\*/g, '.+')).test(requestSettings.url)) {
                return null;
            }
        }

        // Inspect the data submitted in the request (either POST body or GET query string)
        if (handler.data && requestSettings.data) {
            if (!isMockDataEqual(handler.data, requestSettings.data)) {
                // They're not identical, do not mock this request
                return null;
            }
        }
        // Inspect the request type
        if (handler && handler.type &&
                handler.type.toLowerCase() != requestSettings.type.toLowerCase()) {
            // The request type doesn't match (GET vs. POST)
            return null;
        }

        return handler;
    }

    // Process the xhr objects send operation
    function _xhrSend(mockHandler, requestSettings, origSettings) {

        // This is a substitute for < 1.4 which lacks $.proxy
        var process = (function (that) {
            return function () {
                return (function () {
                    var onReady;

                    // The request has returned
                    this.status = mockHandler.status;
                    this.statusText = mockHandler.statusText;
                    this.readyState = 4;

                    // We have an executable function, call it to give
                    // the mock handler a chance to update it's data
                    if ($.isFunction(mockHandler.response)) {
                        mockHandler.response(origSettings);
                    }
                    // Copy over our mock to our xhr object before passing control back to
                    // jQuery's onreadystatechange callback
                    if (requestSettings.dataType == 'json' && (typeof mockHandler.responseText == 'object')) {
                        this.responseText = JSON.stringify(mockHandler.responseText);
                    } else if (requestSettings.dataType == 'xml') {
                        if (typeof mockHandler.responseXML == 'string') {
                            this.responseXML = parseXML(mockHandler.responseXML);
                            //in jQuery 1.9.1+, responseXML is processed differently and relies on responseText
                            this.responseText = mockHandler.responseXML;
                        } else {
                            this.responseXML = mockHandler.responseXML;
                        }
                    } else {
                        this.responseText = mockHandler.responseText;
                    }
                    if (typeof mockHandler.status == 'number' || typeof mockHandler.status == 'string') {
                        this.status = mockHandler.status;
                    }
                    if (typeof mockHandler.statusText === "string") {
                        this.statusText = mockHandler.statusText;
                    }
                    // jQuery 2.0 renamed onreadystatechange to onload
                    onReady = this.onreadystatechange || this.onload;

                    // jQuery < 1.4 doesn't have onreadystate change for xhr
                    if ($.isFunction(onReady)) {
                        if (mockHandler.isTimeout) {
                            this.status = -1;
                        }
                        onReady.call(this, mockHandler.isTimeout ? 'timeout' : undefined);
                    } else if (mockHandler.isTimeout) {
                        // Fix for 1.3.2 timeout to keep success from firing.
                        this.status = -1;
                    }
                }).apply(that);
            };
        })(this);

        if (mockHandler.proxy) {
            // We're proxying this request and loading in an external file instead
            _ajax({
                global: false,
                url: mockHandler.proxy,
                type: mockHandler.proxyType,
                data: mockHandler.data,
                dataType: requestSettings.dataType === "script" ? "text/plain" : requestSettings.dataType,
                complete: function (xhr) {
                    mockHandler.responseXML = xhr.responseXML;
                    mockHandler.responseText = xhr.responseText;
                    // Don't override the handler status/statusText if it's specified by the config
                    if (isDefaultSetting(mockHandler, 'status')) {
                        mockHandler.status = xhr.status;
                    }
                    if (isDefaultSetting(mockHandler, 'statusText')) {
                        mockHandler.statusText = xhr.statusText;
                    }

                    this.responseTimer = setTimeout(process, mockHandler.responseTime || 0);
                }
            });
        } else {
            // type == 'POST' || 'GET' || 'DELETE'
            if (requestSettings.async === false) {
                // TODO: Blocking delay
                process();
            } else {
                this.responseTimer = setTimeout(process, mockHandler.responseTime || 50);
            }
        }
    }

    // Construct a mocked XHR Object
    function xhr(mockHandler, requestSettings, origSettings, origHandler) {
        // Extend with our default mockjax settings
        mockHandler = $.extend(true, {}, $.mockjaxSettings, mockHandler);

        if (typeof mockHandler.headers === 'undefined') {
            mockHandler.headers = {};
        }
        if (mockHandler.contentType) {
            mockHandler.headers['content-type'] = mockHandler.contentType;
        }

        return {
            status: mockHandler.status,
            statusText: mockHandler.statusText,
            readyState: 1,
            open: function () { },
            send: function () {
                origHandler.fired = true;
                _xhrSend.call(this, mockHandler, requestSettings, origSettings);
            },
            abort: function () {
                clearTimeout(this.responseTimer);
            },
            setRequestHeader: function (header, value) {
                mockHandler.headers[header] = value;
            },
            getResponseHeader: function (header) {
                // 'Last-modified', 'Etag', 'content-type' are all checked by jQuery
                if (mockHandler.headers && mockHandler.headers[header]) {
                    // Return arbitrary headers
                    return mockHandler.headers[header];
                } else if (header.toLowerCase() == 'last-modified') {
                    return mockHandler.lastModified || (new Date()).toString();
                } else if (header.toLowerCase() == 'etag') {
                    return mockHandler.etag || '';
                } else if (header.toLowerCase() == 'content-type') {
                    return mockHandler.contentType || 'text/plain';
                }
            },
            getAllResponseHeaders: function () {
                var headers = '';
                $.each(mockHandler.headers, function (k, v) {
                    headers += k + ': ' + v + "\n";
                });
                return headers;
            }
        };
    }

    // Process a JSONP mock request.
    function processJsonpMock(requestSettings, mockHandler, origSettings) {
        // Handle JSONP Parameter Callbacks, we need to replicate some of the jQuery core here
        // because there isn't an easy hook for the cross domain script tag of jsonp

        processJsonpUrl(requestSettings);

        requestSettings.dataType = "json";
        if (requestSettings.data && CALLBACK_REGEX.test(requestSettings.data) || CALLBACK_REGEX.test(requestSettings.url)) {
            createJsonpCallback(requestSettings, mockHandler, origSettings);

            // We need to make sure
            // that a JSONP style response is executed properly

            var rurl = /^(\w+:)?\/\/([^\/?#]+)/,
                    parts = rurl.exec(requestSettings.url),
                    remote = parts && (parts[1] && parts[1] !== location.protocol || parts[2] !== location.host);

            requestSettings.dataType = "script";
            if (requestSettings.type.toUpperCase() === "GET" && remote) {
                var newMockReturn = processJsonpRequest(requestSettings, mockHandler, origSettings);

                // Check if we are supposed to return a Deferred back to the mock call, or just
                // signal success
                if (newMockReturn) {
                    return newMockReturn;
                } else {
                    return true;
                }
            }
        }
        return null;
    }

    // Append the required callback parameter to the end of the request URL, for a JSONP request
    function processJsonpUrl(requestSettings) {
        if (requestSettings.type.toUpperCase() === "GET") {
            if (!CALLBACK_REGEX.test(requestSettings.url)) {
                requestSettings.url += (/\?/.test(requestSettings.url) ? "&" : "?") +
                        (requestSettings.jsonp || "callback") + "=?";
            }
        } else if (!requestSettings.data || !CALLBACK_REGEX.test(requestSettings.data)) {
            requestSettings.data = (requestSettings.data ? requestSettings.data + "&" : "") + (requestSettings.jsonp || "callback") + "=?";
        }
    }

    // Process a JSONP request by evaluating the mocked response text
    function processJsonpRequest(requestSettings, mockHandler, origSettings) {
        // Synthesize the mock request for adding a script tag
        var callbackContext = origSettings && origSettings.context || requestSettings,
                newMock = null;


        // If the response handler on the moock is a function, call it
        if (mockHandler.response && $.isFunction(mockHandler.response)) {
            mockHandler.response(origSettings);
        } else {

            // Evaluate the responseText javascript in a global context
            if (typeof mockHandler.responseText === 'object') {
                $.globalEval('(' + JSON.stringify(mockHandler.responseText) + ')');
            } else {
                $.globalEval('(' + mockHandler.responseText + ')');
            }
        }

        // Successful response
        jsonpSuccess(requestSettings, callbackContext, mockHandler);
        jsonpComplete(requestSettings, callbackContext, mockHandler);

        // If we are running under jQuery 1.5+, return a deferred object
        if ($.Deferred) {
            newMock = new $.Deferred();
            if (typeof mockHandler.responseText == "object") {
                newMock.resolveWith(callbackContext, [mockHandler.responseText]);
            } else {
                newMock.resolveWith(callbackContext, [$.parseJSON(mockHandler.responseText)]);
            }
        }
        return newMock;
    }


    // Create the required JSONP callback function for the request
    function createJsonpCallback(requestSettings, mockHandler, origSettings) {
        var callbackContext = origSettings && origSettings.context || requestSettings;
        var jsonp = requestSettings.jsonpCallback || ("jsonp" + jsc++);

        // Replace the =? sequence both in the query string and the data
        if (requestSettings.data) {
            requestSettings.data = (requestSettings.data + "").replace(CALLBACK_REGEX, "=" + jsonp + "$1");
        }

        requestSettings.url = requestSettings.url.replace(CALLBACK_REGEX, "=" + jsonp + "$1");


        // Handle JSONP-style loading
        window[ jsonp ] = window[ jsonp ] || function (tmp) {
            data = tmp;
            jsonpSuccess(requestSettings, callbackContext, mockHandler);
            jsonpComplete(requestSettings, callbackContext, mockHandler);
            // Garbage collect
            window[ jsonp ] = undefined;

            try {
                delete window[ jsonp ];
            } catch (e) {
            }

            if (head) {
                head.removeChild(script);
            }
        };
    }

    // The JSONP request was successful
    function jsonpSuccess(requestSettings, callbackContext, mockHandler) {
        // If a local callback was specified, fire it and pass it the data
        if (requestSettings.success) {
            requestSettings.success.call(callbackContext, mockHandler.responseText || "", status, {});
        }

        // Fire the global callback
        if (requestSettings.global) {
            trigger(requestSettings, "ajaxSuccess", [{}, requestSettings]);
        }
    }

    // The JSONP request was completed
    function jsonpComplete(requestSettings, callbackContext) {
        // Process result
        if (requestSettings.complete) {
            requestSettings.complete.call(callbackContext, {}, status);
        }

        // The request was completed
        if (requestSettings.global) {
            trigger("ajaxComplete", [{}, requestSettings]);
        }

        // Handle the global AJAX counter
        if (requestSettings.global && !--$.active) {
            $.event.trigger("ajaxStop");
        }
    }


    // The core $.ajax replacement.
    function handleAjax(url, origSettings) {
        var mockRequest, requestSettings, mockHandler;

        // If url is an object, simulate pre-1.5 signature
        if (typeof url === "object") {
            origSettings = url;
            url = undefined;
        } else {
            // work around to support 1.5 signature
            origSettings.url = url;
        }

        // Extend the original settings for the request
        requestSettings = $.extend(true, {}, $.ajaxSettings, origSettings);

        // Iterate over our mock handlers (in registration order) until we find
        // one that is willing to intercept the request
        for (var k = 0; k < mockHandlers.length; k++) {
            if (!mockHandlers[k]) {
                continue;
            }

            mockHandler = getMockForRequest(mockHandlers[k], requestSettings);
            if (!mockHandler) {
                // No valid mock found for this request
                continue;
            }

            mockedAjaxCalls.push(requestSettings);

            // If logging is enabled, log the mock to the console
            $.mockjaxSettings.log(mockHandler, requestSettings);


            if (requestSettings.dataType === "jsonp") {
                if ((mockRequest = processJsonpMock(requestSettings, mockHandler, origSettings))) {
                    // This mock will handle the JSONP request
                    return mockRequest;
                }
            }


            // Removed to fix #54 - keep the mocking data object intact
            //mockHandler.data = requestSettings.data;

            mockHandler.cache = requestSettings.cache;
            mockHandler.timeout = requestSettings.timeout;
            mockHandler.global = requestSettings.global;

            copyUrlParameters(mockHandler, origSettings);

            (function (mockHandler, requestSettings, origSettings, origHandler) {
                mockRequest = _ajax.call($, $.extend(true, {}, origSettings, {
                    // Mock the XHR object
                    xhr: function () {
                        return xhr(mockHandler, requestSettings, origSettings, origHandler);
                    }
                }));
            })(mockHandler, requestSettings, origSettings, mockHandlers[k]);

            return mockRequest;
        }

        // We don't have a mock request
        if ($.mockjaxSettings.throwUnmocked === true) {
            throw('AJAX not mocked: ' + origSettings.url);
        } else { // trigger a normal request
            return _ajax.apply($, [origSettings]);
        }
    }

    /**
     * Copies URL parameter values if they were captured by a regular expression
     * @param {Object} mockHandler
     * @param {Object} origSettings
     */
    function copyUrlParameters(mockHandler, origSettings) {
        //parameters aren't captured if the URL isn't a RegExp
        if (!(mockHandler.url instanceof RegExp)) {
            return;
        }
        //if no URL params were defined on the handler, don't attempt a capture
        if (!mockHandler.hasOwnProperty('urlParams')) {
            return;
        }
        var captures = mockHandler.url.exec(origSettings.url);
        //the whole RegExp match is always the first value in the capture results
        if (captures.length === 1) {
            return;
        }
        captures.shift();
        //use handler params as keys and capture resuts as values
        var i = 0,
                capturesLength = captures.length,
                paramsLength = mockHandler.urlParams.length,
                //in case the number of params specified is less than actual captures
                maxIterations = Math.min(capturesLength, paramsLength),
                paramValues = {};
        for (i; i < maxIterations; i++) {
            var key = mockHandler.urlParams[i];
            paramValues[key] = captures[i];
        }
        origSettings.urlParams = paramValues;
    }


    // Public

    $.extend({
        ajax: handleAjax
    });

    $.mockjaxSettings = {
        //url:        null,
        //type:       'GET',
        log: function (mockHandler, requestSettings) {
            if (mockHandler.logging === false ||
                    (typeof mockHandler.logging === 'undefined' && $.mockjaxSettings.logging === false)) {
                return;
            }
            if (window.console && console.log) {
                var message = 'MOCK ' + requestSettings.type.toUpperCase() + ': ' + requestSettings.url;
                var request = $.extend({}, requestSettings);

                if (typeof console.log === 'function') {
                    console.log(message, request);
                } else {
                    try {
                        console.log(message + ' ' + JSON.stringify(request));
                    } catch (e) {
                        console.log(message);
                    }
                }
            }
        },
        logging: true,
        status: 200,
        statusText: "OK",
        responseTime: 500,
        isTimeout: false,
        throwUnmocked: false,
        contentType: 'text/plain',
        response: '',
        responseText: '',
        responseXML: '',
        proxy: '',
        proxyType: 'GET',

        lastModified: null,
        etag: '',
        headers: {
            etag: 'IJF@H#@923uf8023hFO@I#H#',
            'content-type': 'text/plain'
        }
    };

    $.mockjax = function (settings) {
        var i = mockHandlers.length;
        mockHandlers[i] = settings;
        return i;
    };
    $.mockjaxClear = function (i) {
        if (arguments.length == 1) {
            mockHandlers[i] = null;
        } else {
            mockHandlers = [];
        }
        mockedAjaxCalls = [];
    };
    $.mockjax.handler = function (i) {
        if (arguments.length == 1) {
            return mockHandlers[i];
        }
    };
    $.mockjax.mockedAjaxCalls = function () {
        return mockedAjaxCalls;
    };
})(jQuery);
